[FFmpeg-trac] #9281(avformat:new): wrong $Number$ value while reading mpd
FFmpeg
trac at avcodec.org
Wed Jun 9 02:08:46 EEST 2021
#9281: wrong $Number$ value while reading mpd
-------------------------------------+------------------------------------
Reporter: Kostik | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: avformat
Version: unspecified | Resolution:
Keywords: dash | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+------------------------------------
Changes (by Carl Eugen Hoyos):
* keywords: mpd manifest => dash
* component: ffmpeg => avformat
Old description:
> Hello,
>
> using the latest static build ffmpeg version N-57631-gebedd26eef-static
> I want to read mpd and convert to mpegts - this part works ok,
> except one manifest
> looks like ffmpeg make wrong calculation for $Number$
>
> In my case I have
> availabilityStartTime="2021-05-27T11:59:16Z"
> media="$RepresentationID$-$Number$.m4s"
> duration="180180"
> startNumber="487925"
> presentationTimeOffset="89360526151"
>
> I expect $Number$ to be converted to 488430 (and other players do so),
> but ffmpeg try retrieve 397033568
>
> here is full manifest
>
> <?xml version="1.0" encoding="UTF-8"?>
> <MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:cenc="urn:mpeg:cenc:2013"
> xmlns:mspr="urn:microsoft:playready"
> xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd"
> type="dynamic" minimumUpdatePeriod="PT6S" minBufferTime="PT1.000S"
> maxSegmentDuration="PT3.003S"
> availabilityStartTime="2021-05-27T11:59:16Z"
> timeShiftBufferDepth="PT36.036S" publishTime="2021-06-07T19:25:48Z"
> profiles="urn:mpeg:dash:profile:isoff-live:2011">
> <Period id="487925" start="PT976813.47S">
> <AdaptationSet mimeType="video/mp4" segmentAlignment="true"
> startWithSAP="1" maxWidth="1280" maxHeight="720"
> maxFrameRate="60000/1001" par="16:9">
> <InbandEventStream schemeIdUri="urn:mpeg:dash:event:2012"
> value="1"/>
> <Accessibility schemeIdUri="urn:scte:dash:cc:cea-608:2015"
> value="CC1:und;CC2:und"/>
> <SegmentTemplate timescale="90000"
> media="$RepresentationID$-$Number$.m4s" startNumber="487925"/>
> <Representation id="video1" width="1280" height="720"
> frameRate="60000/1001" sar="1:1" scanType="progressive"
> bandwidth="6562944" codecs="avc1.640029"/>
> </AdaptationSet>
> <AdaptationSet mimeType="audio/mp4" lang="en" segmentAlignment="true"
> startWithSAP="1">
> <Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
> <SegmentTemplate timescale="90000"
> media="$RepresentationID$-$Number$.m4s" startNumber="487925"/>
> <Representation id="audio1" audioSamplingRate="44100"
> bandwidth="96000" codecs="mp4a.40.2">
> <AudioChannelConfiguration
> schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011"
> value="2"/>
> </Representation>
> </AdaptationSet>
> <AdaptationSet mimeType="audio/mp4" lang="es" segmentAlignment="true"
> startWithSAP="1">
> <Role schemeIdUri="urn:mpeg:dash:role:2011" value="dub"/>
> <SegmentTemplate timescale="90000"
> media="$RepresentationID$-$Number$.m4s" startNumber="487925"/>
> <Representation id="audio2" audioSamplingRate="44100"
> bandwidth="96000" codecs="mp4a.40.2">
> <AudioChannelConfiguration
> schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011"
> value="2"/>
> </Representation>
> </AdaptationSet>
> </Period>
> <UTCTiming schemeIdUri="urn:mpeg:dash:utc:direct:2014"
> value="2021-06-07T19:25:48Z"/>
> </MPD>
New description:
Hello,
using the latest static build ffmpeg version N-57631-gebedd26eef-static
I want to read mpd and convert to mpegts - this part works ok,
except one manifest
looks like ffmpeg make wrong calculation for $Number$
In my case I have
availabilityStartTime="2021-05-27T11:59:16Z"
media="$RepresentationID$-$Number$.m4s"
duration="180180"
startNumber="487925"
presentationTimeOffset="89360526151"
I expect $Number$ to be converted to 488430 (and other players do so), but
ffmpeg try retrieve 397033568
here is full manifest
{{{
<?xml version="1.0" encoding="UTF-8"?>
<MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:cenc="urn:mpeg:cenc:2013"
xmlns:mspr="urn:microsoft:playready"
xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd"
type="dynamic" minimumUpdatePeriod="PT6S" minBufferTime="PT1.000S"
maxSegmentDuration="PT3.003S" availabilityStartTime="2021-05-27T11:59:16Z"
timeShiftBufferDepth="PT36.036S" publishTime="2021-06-07T19:25:48Z"
profiles="urn:mpeg:dash:profile:isoff-live:2011">
<Period id="487925" start="PT976813.47S">
<AdaptationSet mimeType="video/mp4" segmentAlignment="true"
startWithSAP="1" maxWidth="1280" maxHeight="720" maxFrameRate="60000/1001"
par="16:9">
<InbandEventStream schemeIdUri="urn:mpeg:dash:event:2012"
value="1"/>
<Accessibility schemeIdUri="urn:scte:dash:cc:cea-608:2015"
value="CC1:und;CC2:und"/>
<SegmentTemplate timescale="90000"
media="$RepresentationID$-$Number$.m4s" startNumber="487925"/>
<Representation id="video1" width="1280" height="720"
frameRate="60000/1001" sar="1:1" scanType="progressive"
bandwidth="6562944" codecs="avc1.640029"/>
</AdaptationSet>
<AdaptationSet mimeType="audio/mp4" lang="en" segmentAlignment="true"
startWithSAP="1">
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
<SegmentTemplate timescale="90000"
media="$RepresentationID$-$Number$.m4s" startNumber="487925"/>
<Representation id="audio1" audioSamplingRate="44100"
bandwidth="96000" codecs="mp4a.40.2">
<AudioChannelConfiguration
schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011"
value="2"/>
</Representation>
</AdaptationSet>
<AdaptationSet mimeType="audio/mp4" lang="es" segmentAlignment="true"
startWithSAP="1">
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="dub"/>
<SegmentTemplate timescale="90000"
media="$RepresentationID$-$Number$.m4s" startNumber="487925"/>
<Representation id="audio2" audioSamplingRate="44100"
bandwidth="96000" codecs="mp4a.40.2">
<AudioChannelConfiguration
schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011"
value="2"/>
</Representation>
</AdaptationSet>
</Period>
<UTCTiming schemeIdUri="urn:mpeg:dash:utc:direct:2014"
value="2021-06-07T19:25:48Z"/>
</MPD>
}}}
--
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Ticket URL: <https://trac.ffmpeg.org/ticket/9281#comment:1>
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